I'm searching a simple and cost-less way to remove the fisheye effect by:
adding a material (additional corrective lens)
or
find the right software (free if possible) to remove the fisheye effect on ...

I've recently been looking at lens distortion correction solutions, and I just wonder what the values a, b and c actually mean. (I'm using Hugin/lensfun, I don't know if these are standard values or ...

Automatic correction of various lens distortions is possible through specialized software that takes a few camera parameters and produces an output image free of distortion.
Why don't most cameras do ...

I've got a Olympus Body Cap 9mm fisheye lens for my Panasonic DMC-GM1 camera. I was told to use Hugin to correct the fisheyed pictures taken with that lens.
When I import my pictures into Hugin, it ...

Can anybody tell me why the heads of the two women are stretched in the corners? What is the name of this defect and how could one avoid it?
I'm not a photographer (though becoming one is one of my ...

I recently took the photos for a panorama in Chicago. Unfortunately, I didn't think the situation through properly, and I shot at a wide angle. When I first attempted to stitch the photos, I got this ...

Is there an accurate way of explaining face-warping when using wide angle lenses?
I realised I can't actually explain it without diagrams, so a succinct definition (no more than a few lines) would be ...

I recently bought a Sony NEX 5N with the standard 18-55mm lens kit and noticed today that it has a high lens distortion (see below). Enabling the option to suppress lens distortion in the setup did ...

I was taking a photo at an airport when I accidentally zoomed my Canon SX40HS into a window. The impact wasn't super hard, but there was a thump. I cannot see any visible damage, but how can I check ...

There was recently a video posted about how different focal lengths affect portrait photography, specifically how distortion at smaller focal lengths have more distortion and are less flattering.
So ...

I bought a Tamron CF Macro 28-70mm 3.5-4.5 lens on eBay for $35 AUD plus postage - cheap enough to give it a go and see what it's like.
I took a range of photos with my Sony NEX-C3 to get a feel for ...

I just got the Sony DSC-WX9 and DSC-HX100V a couple months ago, and found that, if a person's face is right in the center of the photo (for a photo with 4, 5 people standing, from head to toe), then ...

I have recently started to play with Panography, which is a style of stitching pictures together, however on my first couple of attempts, quite a few of the pictures that I took were distorted towards ...

I usually take a picture of bill or receipt using my mobile phone and store it in a computer. Is there any desktop or Web-based software which can straighten the photo of a paper and flatten it? For ...

Lightroom has Lens Correction tools such as Distortion, Vignetting, Chromatic Abberation, etc. depending on the brand and model of lens.
Due to this feature, is it less relevant what the distortion ...

In the standard model for a lens straight lines in the subject of a photograph will always end up straight. However I have seen a variety of photographs in which straight lines end up being curved, ...

Lightroom eats the distortion present in the D7000's kit lens for lunch. However, it's time consuming to check which photos I like by performing this correction on all the photos in lightroom first. ...

Panasonic GH2 automatically corrects lens geometric distortion and chromatic aberration. If I understand it right, it always applies this correction just after reading from the sensor — so the image ...

I've been thinking about Micro Four Thirds, which in many cases encodes distortion and chromatic aberration correction into the raw files. But, the raw processor I currently use (Bibble) ignores this ...

A photo contains digital information about the make of the camera the focal length,etc. Does any software use this information and auto correct the lens distortion in the photo. I know that Photoshop ...